このkrb5 の更新では、次の問題が修正されます：キャッシュサイドチャネル攻撃の軽減：

  - CVE-2017-15088: get_matching_data()でのバッファオーバーフローが修正されました。これは、特定の状況下でコードの実行に使用される可能性がありました（bsc#1065274）

注意：Tenable Network Securityは、前述の記述ブロックをSUSEセキュリティアドバイザリから直接抽出しています。Tenableでは、新たな問題を持ち込まずに、できる限り自動的に整理して書式設定するようにしています。

CVE-2017-15088を修正します（get_matching_data()のバッファオーバーフロー）

----

python-pyrad上のビルド依存関係を削除します。これは、テストスイートでのみ使用されます。テストが存在しない場合は警告なしでスキップされます。

注意：Tenable Network Securityは、前述の記述ブロックをFedora更新システムのWebサイトから直接抽出しています。
Tenableでは、新たな問題を持ち込まずに、できる限り自動的に整理して書式設定するようにしています。

このkrb5 の更新では、次のセキュリティ問題が修正されます：

  - CVE-2017-15088: get_matching_data()でのバッファオーバーフローが修正されました。これは、特定の状況下でコードの実行に使用される可能性がありました（bsc#1065274）

この更新はSUSEからインポートされました：SLE-12-SP2: 更新プロジェクトを更新します。

An update of the krb5 package has been released.

This update for krb5 fixes the following securitz issue&Ouml;

  - CVE-2017-15088: A buffer overflow in get_matching_data()     was fixed that could under specific circumstances be     used to execute code (bsc#1065274)

This update was imported from the SUSE:SLE-12-SP2:Update update project.

Fix CVE-2017-15088 (Buffer overflow in get_matching_data())

----

Remove build dependency on python-pyrad. It is only used on the test suite, and we gracefully skip the tests if it is not present.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the version of the krb5 packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT     Kerberos 5 (aka krb5) through 1.15.2 mishandles     Distinguished Name (DN) fields, which allows remote     attackers to execute arbitrary code or cause a denial     of service (buffer overflow and application crash) in     situations involving untrusted X.509 data, related to     the get_matching_data and X509_NAME_oneline_ex     functions. (CVE-2017-15088)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - krb5: Buffer overflow in get_matching_data() (CVE-2017-15088)

  - Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified impact via     vectors involving automatic deletion of security contexts on error. (CVE-2017-11462)

  - MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an     ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths     lacks a recursion limit. (CVE-2020-28196)

  - ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before     1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon     crash. This occurs because a return value is not properly managed in a certain situation. (CVE-2021-36222)

  - Kerberos 5 (aka krb5) 1.21.2 contains a memory leak in /krb5/src/lib/rpc/pmap_rmt.c. (CVE-2024-26458)

  - Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/lib/gssapi/krb5/k5sealv3.c.
    (CVE-2024-26461)

  - Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c. (CVE-2024-26462)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

According to the versions of the krb5 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - null dereference in kadmind or DN container check     bypass by supplying special crafted data     (CVE-2018-5729)

  - DN container check bypass by supplying special crafted     data (CVE-2018-5730)

  - A stack based buffer overflow was found in the     get_matching_data() function, when reading the     principal's certificate during pkinit     preauthentication. If the Certifcate Authority's     subject line is sufficiently long, an attacker able to     have a specially crafted certificate signed could crash     the authentication process, such as kinit, or,     possibly, run arbitrary code.(CVE-2017-15088 )

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the version of the krb5 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  - plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT     Kerberos 5 (aka krb5) through 1.15.2 mishandles     Distinguished Name (DN) fields, which allows remote     attackers to execute arbitrary code or cause a denial     of service (buffer overflow and application crash) in     situations involving untrusted X.509 data, related to     the get_matching_data and X509_NAME_oneline_ex     functions. (CVE-2017-15088)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for krb5 fixes the following issues: Security issues fixed :

  - CVE-2017-15088: A buffer overflow in get_matching_data()     was fixed that could under specific circumstances be     used to execute code (bsc#1065274)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名稱	產品	系列	已發布	已更新	嚴重性
104473	SUSE SLED12 / SLES12セキュリティ更新プログラム：krb5 (SUSE-SU-2017:2948-1)	Nessus	SuSE Local Security Checks	2017/11/9	2021/1/6	critical
105842	Fedora 27：krb5（2017-2dd6c320a4）	Nessus	Fedora Local Security Checks	2018/1/15	2021/1/11	critical
104524	openSUSEセキュリティ更新プログラム：krb5 (openSUSE-2017-1266)	Nessus	SuSE Local Security Checks	2017/11/13	2021/1/19	critical
121779	Photon OS 1.0: Krb5 PHSA-2017-1.0-0093	Nessus	PhotonOS Local Security Checks	2019/2/7	2019/2/7	critical
104524	openSUSE Security Update : krb5 (openSUSE-2017-1266)	Nessus	SuSE Local Security Checks	2017/11/13	2021/1/19	critical
121788	Photon OS 2.0: Krb5 PHSA-2017-2.0-0007	Nessus	PhotonOS Local Security Checks	2019/2/7	2019/2/7	critical
105842	Fedora 27 : krb5 (2017-2dd6c320a4)	Nessus	Fedora Local Security Checks	2018/1/15	2021/1/11	critical
106149	EulerOS 2.0 SP2 : krb5 (EulerOS-SA-2018-1008)	Nessus	Huawei Local Security Checks	2018/1/19	2021/1/6	critical
196450	RHEL 7 : krb5 (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	2024/5/11	2024/5/11	critical
106148	EulerOS 2.0 SP1 : krb5 (EulerOS-SA-2018-1007)	Nessus	Huawei Local Security Checks	2018/1/19	2021/1/6	critical
119526	EulerOS 2.0 SP3 : krb5 (EulerOS-SA-2018-1398)	Nessus	Huawei Local Security Checks	2018/12/10	2021/1/6	critical
117549	EulerOS Virtualization 2.5.0 : krb5 (EulerOS-SA-2018-1240)	Nessus	Huawei Local Security Checks	2018/9/18	2021/1/6	critical
104473	SUSE SLED12 / SLES12 Security Update : krb5 (SUSE-SU-2017:2948-1)	Nessus	SuSE Local Security Checks	2017/11/9	2021/1/6	critical

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